melatonin hormone molecule. in humans, it plays a role in circadian rhythm synchronization. skeletal formula.

melatonin hormone molecule humans it plays role circadian rhythm synchronization skeletal formula melatonine melatonina tryptamine sleep time timing receptor disorder drug pineal gland clock daynight cycle antioxidant dietary supplement food seasonal affective jet lag shift work anxiety hydrogen nitrogen carbon oxygen atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon